21
is it somewhat like this? sorry for the image quality.
13 Answers
33just differentiaite....
and get hint from derivative...
waise goood question...
1differentiate.......take some trouble eureka123..........
u migth see ∂y/∂x>=0; for all x.
1if i am not wrong...
saket's graph has a small mistake...
he is changing concavity b4 x=1....
but it will change at x=1.
62yup you are right sky...
(my basic reason for giving this graph was just that people are able to give the right overall points and not be taken aback by power 21 and ask for 21 or 9 roots :)
13yes ...sky
concavity changes just at x=1
see my graph
62abhirup i really wanted to pink your graph.. but your graph made me feel that it is not differentiable :(